Joseph mitchell



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JOSEPH y MITCHELL-,br SHEFFIELD, AssLGNon To WILLIAM EDWARD' NEWTON, orLONDON; ENGLAND.

. )LettesPatentoi 105,47 8, dated July 19, 1870; patented in VEnglandMay 18, 1868.

The Schedule referred .to in these Lettera Patent and making part of thesame.

is a full, clear, and exact description thereof', which will enableothers skilled in `the art to make and use tbc same, reference being hadto the accompanying drawing forming part of` this specicatibn-`'.lliisinvention has `for `its object improvement in` that classofelliptical" car or carriage-springslin which thc platescomposing saidspringsare held together,

rwithout the aidl ofV bolts passing througlrtheni, by

lneans of indentatiolis or corrugations-f'ormed onthe plates themselvestanda@ t i t 'The' invention consists `in `providing a` cross-pin orbolt-,which [its snugly into the concaverecess 'of one V oftheplates,forthepurposc of securing them in a box adapted to receive thesame, as hereinafter set In the accompanying drawing is 'an elevationoft-an elliptic or dat bear ing-spring,consistingof several plates a a,the square metal box lor collar l), which holds ythe `plates a together,being shown in section. y

Figure 1-is a plan view: and E Figure 1", an edge view of one of theplates a de` tathed, showingthe corrugatipn a* made therein.'

" Figure 1,are front and' sectional views of the box or collarb, inwhich the plates a are secured by the cylindrical. or semi-cylindrical"cross-pin c, as shown at FigurevZis ascctionalelevation Vof aVmodification shown in the drawing or a single butteriiy-plate may beused and secured in place by U-straps or bolts b, as shown at iig. 3".

. In other inventions, indentations have been made in the center of theplates. as shown in figs. 4 and 4* and 4" the indcntations fitting eachvother, vbut this I Having thnsdescribedmy invention, Y

' I claim as new, and desireto secure by Letters Patent- "The cross-pinc'-, arranged with the plates com-posingthe spring, and with the box b,as and for the purpose specified. f In witness whereof, I, the saidJOSEPH MITCHELL,

` have hereunto set my landgjand seal, the tenth day "of March, in theyear of our Lord one thousand eight hundred and seventy. t. Y y

` JOSEPH MITCHELL. [L. s.]

Witnesses: DANI.. FoRsHAW,

' 24 Royal Exchange, Loudon. J. L. FoRsHAw,

. 24113031111 Exchange, London.

